LF / VLF tracking device system

[alprinceeg]

Worm Greeting from EGYPT

please read

Wolfgang Friese electronic
http://wfe-ortungssysteme.de/ In German

Methods and system for multi-path mitigation in tracking objects using reduced attenuation RF technology Document Type and Number:United States Patent 7872583
www.freepatentsonline.com/7872583.html

VLF-LF Receiver 10 -500 kHz with Resistance Tuning by Lloyd Butler VK5BR
http://www.qsl.net/vk5br/VLFLFRx.htm


http://www.spawar.navy.mil/sti/publi...742/tr1742.pdf NRaD TR 1742 (PDF format)
Technique for Building and Calibrating VLF/LF Receive Loop Antennas, April 1997.

[alprinceeg]

The self-construction of LF-/VLF-Ortungsgeräten

http://www.wilhelm-herbst-verlag.de/...gsgeraten.html
Der Selbstbau von LF-/VLF-Ortungsgeräten " The self-construction of LF-/VLF-Ortungsgeräten "
Wolfgang Friese Issue
Edition 2009
116 pages, numerous. Circuits, drawings and illustrations Publisher
No ISBN-10
No ISBN-13
978-3-923925-79-7 Published
2009

Additional Information
This book contains a collection of circuits of different LF and VLF-detection devices based on the EAP-boards.
It will be presented and described the following issues: tracking devices with EAP-boards; The EAP system, adapting amplifier for the sensor coil; Wien-bridge resonant-pass filter, high and low pass filters, signal amplifiers, LED drivers, the compensation circuit, voltage and frequency converter; Easy unipolar powered tracking device for DCF 77 with resonant filter and LED ribbon display; circuit for the acoustic output of the measuring signal; Universal Platinum system for the construction of detectors; small generator for cable search; own transmitter for tracking purposes, etc.